/*  Copyright © 2009 Blake Hegerle -*- C++ -*- */

/*  This file is part of metal.
 
    Metal is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
    
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see
    <http://www.gnu.org/licenses/>.

*/

#pragma once

#include "util.h"
#include "forward.h"
#include "function_detail.h"
#include "expr_impl.h"

namespace metal {
  template<typename T, typename... Params>
  struct lambda_placeholder {
    template<typename Expr>
    expression<
      meta::lambda_expr<
	T,
	typename expression_type_of<Expr>::meta_type,
	Params...
      >
    >
    operator()(Expr e) {
      auto body = expression_type_of<Expr>::impl(e);

      std::vector<param_impl> params(count<Params...>::value);
      function_detail::meta_param<Params...>::lower(params);

      return new lambda_expr_impl(body, params);
    }
  };
}
